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采用猝冷法制备了不同Mo含量的Ni Mo Al合金 ,经碱处理活化后得到猝冷Ni Mo骨架催化剂 .以ICP ,N2 物理吸附 ,XRD ,H2 TPD等手段对合金及催化剂的物化性质进行了表征 .结果表明 ,随着Mo含量的增加 ,合金中依次出现Ni16Mo10 Al74,MoAl3 物相 ,同时NiAl3 相减少 ,Ni2 Al3 相增加 .Mo的存在使合金中更多的铝被抽提 ,减少了催化剂中残留的Ni2 Al3 物相 ,催化剂的比表面积、平均孔径、孔容和晶粒尺寸均随Mo含量增加而减小 .将催化剂用于 2 乙基蒽醌加氢反应 ,发现Mo加快了反应速率 ,同时抑制了降解产物的产生 .在催化剂中Mo含量达到 2 47wt%时 ,双氧水的得率可达到 10 0 % .结合Ni晶粒大小、表面吸附氢状态、Mo的化学态 ,进一步讨论了Mo对猝冷Ni Mo骨架催化性能的修饰作用 .
The Ni Mo Al alloys with different Mo content were prepared by quenching method, and quenched Ni Mo skeleton catalyst was obtained by alkali treatment.The physical and chemical properties of the alloy and catalyst were characterized by ICP, N2 physical adsorption, XRD and H2 TPD .The results show that with the increase of Mo content, Ni16Mo10 Al74 and MoAl3 phases appear in the alloy, while the NiAl3 phase decreases and the Ni2Al3 phase increases.The presence of Mo makes the extraction of more aluminum in the alloy, reducing the catalyst , The specific surface area, average pore diameter, pore volume and grain size of Ni2Al3 phase remained in the catalyst decreased with the increase of Mo content.The catalyst was used to hydrogenate 2-ethyl anthraquinone and found that Mo accelerated the reaction rate , While inhibiting the production of degradation products.When the Mo content in the catalyst reached 2 47wt%, the yield of hydrogen peroxide could reach 100% .Based on the Ni grain size, the surface adsorbed hydrogen state and the chemical state of Mo, Mo Modification of the Catalytic Performance of Quenched Ni Mo Skeleton.